13222331 has 2 divisors, whose sum is σ = 13222332. Its totient is φ = 13222330.

The previous prime is 13222327. The next prime is 13222343. The reversal of 13222331 is 13322231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13222331 - 2² = 13222327 is a prime.

It is a super-2 number, since 2×13222331² = 349660074147122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13222301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6611165 + 6611166.

It is an arithmetic number, because the mean of its divisors is an integer number (6611166).

Almost surely, 2^13222331 is an apocalyptic number.

13222331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13222331 is an equidigital number, since it uses as much as digits as its factorization.

13222331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 17.

The square root of 13222331 is about 3636.2523289783. The cubic root of 13222331 is about 236.4663466157.

Adding to 13222331 its reverse (13322231), we get a palindrome (26544562).

The spelling of 13222331 in words is "thirteen million, two hundred twenty-two thousand, three hundred thirty-one".